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Abstract

This article describes a method of producing vivid images on a radial output device such as a watch. Moire circles and rotating shaded areas are used to increase the visual area. This serves as an aid to the visually impaired in reading the unit. (Image Omitted)

Country

United States

Language

English (United States)

This text was extracted from a PDF file.

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This is the abbreviated version, containing approximately
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Page 1 of 4

Watch With Patterns for Visually Impaired

This article describes a method of producing vivid images on a radial output
device such as a watch. Moire circles and rotating shaded areas are used to
increase the visual area. This serves as an aid to the visually impaired in reading
the unit.

(Image Omitted)

Dial analog readouts, such as a watch, altimeters and directional indicators
typically use a narrow pointing arrow to indicate the intended visual output. This
can be difficult to read for the visually handicapped and in high stress situations.
The device described in this article uses large darkened areas and moire circles
to produce an improved visual effect for the user.

Described here is a watch with rotating shaded areas and moire circles. The
principles used can be extended to any visual output device. Fig. 1 shows a
watch 1 that has a series of concentric circles 2 on the inner surface. The center
of these circles is offset from the center of rotation for the device.

The minute hand for this watch consists of concentric circles 3 that are
identical to the concentric circles on the inner surface of the base. These circles
are offset from the center of rotation and exactly overlap the circles on the base
at the start of each hour. Thus, the pattern is pure circles exactly on the hour,
and visually distinct moire circles are present for a few minutes before and after
each hour. The moire circles produced during other parts of the hour are visually
distinct from the period described.

The minute hand includes a large shaded area 4 that is easy for the eye to
detect. It consists of a shaded half circle with a pointer 5. The user can briefly
look at the large shaded semicircle, and even if it is not clear, the semicircle
immediately registers in the mind. Thus, the user readily knows the time. The
large area allows the shaded image to be detectable in the eye longer than the
user is looking at the watch, thus, he can quickly loo...